Everyone knows how terrible it is to come into contact with those people who have an undisciplined missionary urge, who, having received some grace, are continually trying to force the same grace on others, to compel them not only to be converted but to be converted in the same way and with precisely the same results as themselves.
Such people seem to wish to dictate to the Holy Ghost. God is to inspire their neighbor to see things just as they do, to join the same societies, to plunge into the same activities. They go about like the scriptural monster, seeking whom they may devour. They insist that their victims have obvious vocations to assist in, or even be completely sacrificed to, their own interests. Very often they unwittingly tear out the tender little shoot of Christ-life that was pushing up against the dark heavy clay, and when the poor victim has been devoured, he is handed over, spiritless and broken, as a predigested morsel for the next one-hundred-percent zealot who comes along.
The Reed of God by Caryll Houselander